class Person:
    def __init__(self,name,weight) -> None:
        self.name = name
        self.weight = weight
    def __str__(self) -> str:
        return "我的名字叫%s 体重是 %.2f 公斤  " % (self.name,self.weight)
        
    def run(self):
        
        print("%s 爱跑步，跑步锻炼身体"%self.name)
        self.weight -= 0.5
    def eat(self):
        
        print("%s 是干饭王，吃完这一顿再减肥"%self.name)
        self.weight += 1
xiaoming = Person("小明",75.0)
xiaoming.run()
xiaoming.eat()
print(xiaoming)

#小美爱跑步
xiaomei = Person('小美',45.0)
xiaomei.run()
xiaomei.eat()
print(xiaomei)